The singer was amazed by the hordes of fans who waited all night in the rain to see him perform. Before taking the stage, he tweeted, "Wow hahaha! The lines around all the blocks nearby, insane! Thank you all. I understand you must be freezing and soaked through."

Wow hahaha ! The lines around all the blocks nearby , insane ! Thank you all . I understand you all must be freezing and soaked through .

After camping out on the street overnight, the energy in the crowd was electric when Horan finally stepped out on the plaza.

In a touching moment, he dedicated his performance of "This Town" to the victims of the bombing in Manchester saying, "Before I start, I would like to dedicate it to the people who lost their lives in Manchester last week. It was a very sad thing, so I just, it's the least I can do is dedicate this song."